Find a peak element in this matrix. Return the index of the peak. Guarantee that there is at least one peak, andifthere are multiple peaks,returnany one of them. Example Example 1: Input: [ [1, 2, 3, 6, 5], [16,41,23,22, 6], [15,17,24,21, 7], [14,18,19,20,10], ...
当nums[mid-1]>nums[mid]时,例如3,2,1 我们把R置为mid-1, 反之,则把L置为mid classSolution {publicintfindPeakElement(int[] nums) {if(nums.length==0 || nums==null)return0;intL = 0;intR = nums.length - 1;while(L<R){intmid = (L+R+1)>>>1;if(nums[mid-1]>nums[mid]){ R=...
上菜 def findPeakElement(self, nums: List[int]) -> int: l, r = 0, len(nums)-1 while l < r: mid = l + (r-l) // 2 if nums[mid] > nums[mid+1]: # no overflow since l<r r = mid else: l = mid + 1 return l salut~编辑...
A peak element is an element that is greater than its neighbors. Given an input array wherenum[i]≠ num[i+1], find a peak element and return its index. The array may contain multiple peaks, in that case return the index to any one of the peaks is fine. You may imagine thatnum[-...
2 public int findPeakElement(int[] num) { 3 for(int i = 1; i < num.length; i++){ 4 if(num[i] < num[i - 1]) 5 return i - 1; 6 } 7 return num.length - 1; 8 } 9 } 1. 2. 3. 4. 5. 6. 7. 8. 9.
Explanation: Your function can return either index number 1 where the peak element is 2, or index number 5 where the peak element is 6. Follow up: Your solution should be in logarithmic complexity. 题目描述: 峰值元素是指其值大于左右相邻值的元素。
public int findPeakElement(int[] nums) { if (nums == null || nums.length == 0) return -1; for (int i = nums.length - 2; i >= 0; i--) { if (nums[i] > nums[i + 1]) continue; else { return i + 1; } }
1. 如果切到的 mid 就是peak element,直接返回,不需要 end = mid再赋值。 2. 如果切到的 mid 在上升区间,那么就往它的右边继续搜索。 3. 如果切到的 mid 在下降区间,那么就往它的左边继续搜索。 mid 为谷值的情况不需要单独考虑,已经包含在上面的 2、3 中。 class Solution: """ @param: A: An ...
Find Peak Element I A peak element is an element that is greater than its neighbors. Given an input array where num[i] ≠ num[i+1], find a peak element and return its index. The array may contain multiple peaks, in that case return the index to any one of the peaks is fine. ...
Find Peak Element A peak element is an element that is greater than its neighbors. Given an input array where num[i] ≠ num[i+1], find a peak element and return its index. The array may contain multiple peaks, in that case return the index to any one of the peaks is fine....